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�������պ����ѧѧ�� 2009, Vol. 35 Issue (8) :957-961    DOI:
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Robust vibration control of flexible piezoelectric structure
Yang Haifeng, Wang Xiaojun, Qiu Zhiping*
School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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Abstract�� The robust vibration control for the flexible cantilever beam system with polytopic-type uncertainties and environmental disturbances is studied. Based on the state equation, the improved multi-objective H2/H state-feedback robust control method is proposed for the flexible cantilever beam system by using a kind of extended linear matrix inequality (LMI). The presented method, which introduces multi Lyapunov functions for the polytopic-type uncertainties system, reduces the conservatism stemmed from the single Lyapunov function used in the unimproved method. The robust vibration control for the flexible cantilever beam system is simulated in Matlab by these two methods respectively. The results show that the flexible cantilever beam is well controlled via the two methods, and the improved method gets a better result.
Keywords�� piezoelectric materials   cantilever beam   uncertain systems   vibration control   robustness   state-feedback     
Received 2008-07-14;
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���ҽܳ������ѧ����������Ŀ(10425208); �ߵ�ѧУѧ�ƴ������Ǽƻ�������Ŀ(B07009); ����������л���������Ŀ(20080503)

About author: ���(1985-),��,�ӱ��ػʵ���,˶ʿ��, buaayhf@sina.com.
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���, ������, ��־ƽ.ѹ�����Խṹ�񶯵�³������[J]  �������պ����ѧѧ��, 2009,V35(8): 957-961
Yang Haifeng, Wang Xiaojun, Qiu Zhiping.Robust vibration control of flexible piezoelectric structure[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2009,V35(8): 957-961
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